of cincinnati



@eine tatee gattini @filza H. L. IUMY, OF CINCINNATI, OHIO.

i Letters Patent No. 72,243, dated December 17,1867.

4BOOKBINDERS BBVELLING-MACHINE.

To ALL WHOM ITYMA'Y CONGE-RN:

Be it known'that 1', H. L. TUM'Z, of Cincinnati, I'amiltoneounty, and State of Ohio, have invented a new and improved Bookbinders Bevclling-Machine, of which the following is a full and clear description, reference being had to the accompanying drawings, making part oflthis specification. I

My invention relates to a rough-faced bevellingllea pivoted to the cuttingedgc of a bed-plate, and so adjusted as to enable the operator to present the leaf or board at any desirable angle with the cutters.

Figure '1 represents a perspective view of my improved bevelling-machine.l

Figure 2 is a transverse section ofthe same, secured to a table.

v A is the bed-plate, made of iron or other suitable material, rmly bolted to the table B by mean's of the bolts b. The' lower front edge, the shear-edge of the bed-plate A, is acutc-angled ata. A rack, e, extends l transversely over the upper face of the bed-plate A, to which it is secured. C is the bevalling-leaf, of light metal, and having au area about equal to that of the bed-plate, to which it is pivoted by pins d. The lower edge of the leaf C is in close contact with the shea1edge of the bed-plate; the lent` C is slotted (e) near each end.

Y The slots are parallel to the ends of the leaf C, and in length nearly the entire width. Bolts, f, provided with thumb-nuts f pass through the slots e, and secure to the roughened or front surface of the bevellngfleaf C the gauging-bar D. The pawl g is pivot-ed to the centre ofthe back face of the bevelling-board C, and steps into the rack e. is the cutter or knife, which may be operated by machinery attached to the table B. 4

The board to be operated ppon is placed upon the bevalling-leafl C. The-gauging-bar'D is placed incon. tact with the upper edge ofthe boat-d, as indicated in red outline in the accompanying drawings, so that the lower edge of the boara shall be even with the shear-edge of the bedplat-e A. By operating the knife 1 the edges of the board arc chamfered cfl. Any desirable angle may bc given this chamfered surface by ele" rating thc'outcr end ofthe bevelling-board or b'evelling-leaf C" above the bed-plate A, and retaining it in Asuch position by stepping the pawl g in the rack c. The ronghcncd surface of the bevelling-leaf C is produced by applying sand-paper, sand, or other equivalent material to the outcrsurface. When so prepared, the operator has no diiculty in keeping in position against the gaugingfbnr D the board which is being bevelled. The two opposite sides of the board are bevclled first, the gauging-bar having been adjusted to the width. A readjustment ofthe gauging-bar is then made, and the other two and opposite edges bevelled.

The great advantage which tho operator finds in thc use of this bcvelling-leafis the ease and quickness withwhich it is adjusted tothe size and angle of bevel ofthe board; also, the little liability of the slippingr ofthe board" while under the knife.

What I claim as new, and of my invention, is

1. The roughened bevelling-lcai` C, for the purpose above specified.

2. The bed-plate B, bevalling-leaf C, gauging-bar D, and pawl y, arranged and operating substantially as and for the purpose herein described and set forth.

H. L. TUMY.

Witnesses:

CHARLES L. FISHER,

SAMUEL R. RUSSELL. 

